Firstly welcome to the forums, it's an excellent place for you to express yourself, judge free and anonymously. It's great to see you've reached out for some support during this tough time at school.
I'd like to start with some background; I think it'll be able to help here. I as of Friday graduated Year 12, and boy I was glad to get out of what I thought was twelve years of life wasted. On top of this, I've been diagnosed with High Functioning Autism and ADHD. I'd say this has contributed slightly to my frustration and such my political views as you also mentioned.
So in saying that, I'm not going to be the guy who says, school is best and stick it out. I believe in what you want to do as long as you know all of the aspects of your decision :) May I ask what state you're in? And what sort of career path/s you want to pursue? Don't worry if you don't know, I have no clue but I'm sure I'll find something.
I'm sorry that you struggle with your anxiety soo much, do you see someone about what you feel and how it affects you? Either a GP, psychiatrist and or psychologist, look I'd even suggest having a chat with your school counsellor it can be quite rewarding, getting your thoughts off your mind even just having a down to earth conversation. I've noticed I get along with adults 2 or 3 times older than me (18) over people my age, are you the same? :), maybe not your English teacher tho ;)
It's great that you've mentioned that you have a support group (your friends), do you talk to them about what you feel or do they comment on it at all? I know why I was at school, I had the most support from my school's Education Assistants.
You mentioned that you are in fear that you will get seriously hurt or bullied, is this because you see this happening to other students or you feel different in some way?
Why do you reckon you don't get along with your English teacher? I hated my English teacher this year, I'd say out of all of mine throughout high school, this was the worse year hahaha.
You mentioned your political views and opinions, and that people oppose your idea when you express it. Is it warranted? I don't know if you'll understand what I mean but, is it relevant to the conversation you're having. Everyone is entitled to an opinion, as long as it's informed and not used to peeve others off hehe. I'm slightly guilty of that occasionally.
I'm running out of words :(, so much more to say. Please keep in contact, and keep your head up.
Talk Soon C